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Rem Revista Escola de Minas
Article . 2012 . Peer-reviewed
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Rem Revista Escola de Minas
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Tratamento de efluentes de eletrodeposição de níquel por fotoeletrooxidação

Authors: Benvenuti, Tatiane; Rodrigues, Marco Antônio Siqueira; Ziulkoski, Ana Luiza; Bernardes, Andréa Moura; Ferreira, Jane Zoppas;

Tratamento de efluentes de eletrodeposição de níquel por fotoeletrooxidação

Abstract

Considerando-se a preocupação crescente com a toxicidade dos efluentes, pela presença de metais e a ocorrência de novos poluentes orgânicos, esse estudo aplicou o Processo Oxidativo Avançado (POA) de fotoeletrooxidação (FEO) como polimento para o efluente após o processo convencional de tratamento de efluentes da indústria metalomecânica, que, muitas vezes, não remove, satisfatoriamente, metais e aditivos orgânicos. A FEO associou, à degradação de aditivos orgânicos, a remoção do níquel. Foram avaliados efluentes sintéticos com composição similar a efluentes do processo de eletrodeposição de níquel contendo aditivos. Empregando o ânodo de Ti revestido com 70%TiO2/30%RuO2 sob incidência de radiação UV de uma lâmpada de vapor de mercúrio de 250 W e um cátodo de aço inox, 2,5 L de efluente foram tratados em um reator de 1,6 L, com vazão de recirculação de 1 L.min-1. Aplicando diferentes densidades de corrente, observou-se redução da DQO de até 83% e remoção de Ni acima de 90%. Os ensaios de citotoxicidade indicaram que a FEO não gerou intermediários mais tóxicos, pois não ocorreu aumento do efeito tóxico na comparação das soluções antes e após a FEO.

Keywords

Níquel, Cytotoxicity, citotoxicidade, Tratamento de efluentes, photo-electro-oxidation, organic additives, aditivos orgânicos, Nickel, Organic additives, cytotoxicity, Fotoeletrooxidação, Photo-electro-oxidation, fotoeletrooxidação

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    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    3
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Average
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Average
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
3
Average
Average
Average
Green
gold